At about 4 minutes into the film, the headphones Teo is wearing appear and disappear between one shot and the other.
At about 37 minutes into the film, during the fight between Teo and the boss, the keys "Alt" and "F4", previously shown taped on the cheek and the belly of the boss, mysteriously disappear.
During the fight with Teo and Mad Mike, before Teo presses the first key to quit the game, Mad Mike is already making a face of pain even before Teo presses the button.